Maupin earned his first cap in November 2013 and played in two victories against Georgia and Russia. Previous to earning those caps, Maupin helped the Eagles Select XV finish second at the 2013 IRB Americans Rugby Championship, scoring two tries in three matches. He was a Collegiate All-American at Saint Mary’s College, played for San Francisco’s Olympic Club, and is currently playing for Trinity College in Dublin while working with Blackrock College.